Pseudo history.
Real history - proto kalenjin and proto oromo moved from Cush empire (present day khartoum-tigray)
They move southwards all the way to east africa - TZ & Kenya & Uganda - possibly as far as Rwanda.
Those were so called eastern cushites - and southern cushites
Proto oromo/galla or southern cushites would later split into oromo and somalis.
Kalenjin would split into their sub tribes.
Later Maasai and Bantus would arrive.
Nearly half cognate or root kalennjin words are similar to Somali
Tree for example - ketit - is the same
Rain is the same - rop - rop
goat is artet - artet
Cognate words are root words that you wont borrow or loan necessarily
Sirikwas were remnant of eastern cushites.
In Tanzania - you will find a perfect mix of old east africa - Iraq cushites - barbabaig/Datooga who are kalenjin - and Maasai.
All in lake Natron.
Absolutely interesting never thought of this makes strong sense! However i don't get how kipsisgis say they came from puntland and still maintain oromo ties. Puntkand is in north somalia and oromo is opposite side in Ethiopia puzzling